Naturally occurring fats, oils, and waxes are known as simple lipids. When simple lipids oxidise, lipid peroxides are produced, often creating a rancid smell and taste. The detection of peroxide is a common indicator of the freshness of these simple lipids. It gives a measurement of how much primary oxidation has taken place. Peroxide value…
Shampoo, or more accurately the concept of shampoo, has existed since the time of the first ancient civilisations. Among centuries of adaptation and development, the act of cleansing hair has changed quite dramatically; at first, a combination of oils, herbs, and perfumes were used as a way to simply freshen hair. Upon further understanding of…
Moisture content is an important parameter in aerosols and creams. Substances such as sunscreen, muscle ache creams, and anti-fungal treatments are considered to be over-the-counter medicines; therefore the composition of these substances is closely monitored. The composition of each batch must match what is registered according to Australian regulatory guidelines for OTC medicines. Application An…
For many years, cosmetics have been used to enhance features, achieve certain styles, and help individuals stand out. As early as 4000B.C. the Egyptians used kohl, a ground mineral, to darken their lashes, brows, and eyelids. Today, mascara is used to enhance eyelashes, and is now marketed for specific features such as water resistance, longevity,…
